Check engine light code P0023

JUMPMAN11C

MEMBER
2008 CADILLAC STS
4.6L
V8
RWD
AUTOMATIC
48,000 MILES

My check engine light came on and it has two active codes. They are both P0023. One says "P0023" and the other says "P0023 P".

When I start it from a cold start, it will idle rough and accelerating does not help to smooth it out. Once I start driving, the car runs smooth and I cannot tell that anything is wrong.

Due to me driving my work truck, I have only put 14,000 in two and half years. Maybe the problem was caused by it sitting too long?

I am going to try to change whatever it is myself (unless it just has to be done at the dealer) to save myself some money. So I am curious if anyone knows what the code might be and what part or sensor I might need?

Thank you in advance for your help.

4 Replies

HMAC300

MECHANIC
48,601 POSTS

P0023 is exhaust camshaft actuator on bank 2 right hand. It has either an open or short in it. It may also have oil plugging the screen if it has one. Check for that. There is no code P0023p.

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Tuesday, April 26th, 2016 AT 1:22 PM

JUMPMAN11C

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2 POSTS

Thank you very much for the information and the picture showing the location. I was not expecting an answer that fast!

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Tuesday, April 26th, 2016 AT 2:27 PM

JUMPMAN11C

MEMBER
2 POSTS

Hello, I located the camshaft actuator magnet in the picture and the connector was full of oil. I checked the actuator next to it and it was full of oil as well. I did not see any screen in there to clean. I took my car to the dealer to see what they thought and they said they recommend to change all four camshaft actuators. I believe the part is GM part number 12567085. Are all four of them the same part number? If I buy four of them and change them myself, will that stop the oil leak into the connector? I am wondering if this a job I should let the dealer do. Just trying to save some money by doing it myself but I do not want to take a chance on messing anything up. I read there was an alignment pin that has to be set just right, and I did not know if that is something the dealer would have to do anyways. Thank you for your help.

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Wednesday, August 17th, 2016 AT 7:17 AM

HMAC300

MECHANIC
48,601 POSTS

To replace it you need a 15/64th drill rod at least 50mm long then follow instructions in picture. You may have to remove other parts to gain access to actuators. I would just replace the one.

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